CN105569550A - Pre-amplifier circuit based automatic control system for roller shutter door - Google Patents
Pre-amplifier circuit based automatic control system for roller shutter door Download PDFInfo
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- CN105569550A CN105569550A CN201510958241.1A CN201510958241A CN105569550A CN 105569550 A CN105569550 A CN 105569550A CN 201510958241 A CN201510958241 A CN 201510958241A CN 105569550 A CN105569550 A CN 105569550A
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- control circuit
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Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/68—Operating devices or mechanisms, e.g. with electric drive
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/68—Operating devices or mechanisms, e.g. with electric drive
- E06B2009/6809—Control
- E06B2009/6818—Control using sensors
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/68—Operating devices or mechanisms, e.g. with electric drive
- E06B2009/6809—Control
- E06B2009/6818—Control using sensors
- E06B2009/6836—Control using sensors sensing obstacle
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses a pre-amplifier circuit based automatic control system for a roller shutter door. The automatic control system is characterized by mainly comprising a CPU (central processing unit), an A/D converter and a control circuit which are connected with the CPU, a pre-amplifier circuit connected with the A/D converter, a photoelectric sensor and an infrared sensor which are connected with the pre-amplifier circuit as well as a lifting motor connected with the control circuit, wherein the control circuit consists of a control chip IC (integrated chip), a signal trigger circuit with the input end connected with the CPU as well as a door opening control circuit and a door closing control circuit with output ends connected with the lifting motor; the signal trigger circuit, the door opening control circuit and the door closing control circuit are connected with the control chip IC. The automatic control system is simple in structure, low in cost and capable of automatically opening and closing the door, so that the roller shutter door can isolate products and the production environment, and the automatic control system is suitable for popularization and application.
Description
Technical field
The present invention relates to a kind of automatic control system, specifically refer to a kind of rolling door automatic control system based on pre-amplification circuit.
Background technology
Because production and processing needs, factory uses rolling door isolated product and production environment usually, the rolling door normally electric rolling door used at present.Electric rolling door is all the positive and negative switch having transferred rolling door by Control monophase machine, namely opens door by raise button, closes door by decline button, stops door action by stop button.Because electric rolling door is all that action carrys out gauge tap artificially, often occur forgetting closing the door or owing to worrying the situation of not closed door, therefore easily make the harmful pollution such as noise, dust or smog enter in rolling door, thus bring to the product in rolling door or production environment greatly to endanger.
Summary of the invention
The object of the invention is to overcome the electric rolling door used at present is all that action carrys out gauge tap artificially, often occur forgetting closing the door or there is no Guan Wanmen owing to worrying and easily make the harmful pollution such as noise, dust or smog enter defect in rolling door, not only structure is simple to provide one, and with low cost, the rolling door automatic control system based on pre-amplification circuit of rolling door can also be closed in time.
The present invention is achieved through the following technical solutions:
A kind of rolling door automatic control system based on pre-amplification circuit, primarily of central processing unit, the A/D converter be all connected with central processing unit and control circuit, the pre-amplification circuit be connected with A/D converter, the photoelectric sensor be all connected with pre-amplification circuit and infrared sensor, and the lifting motor be connected with control circuit forms; Described control circuit by control chip IC, the signal circuits for triggering that input is connected with central processing unit, and the enabling control circuit that is all connected with lifting motor of output and close gate control circuit and form; Described signal circuits for triggering are all connected with control chip IC with enabling control circuit and pass gate control circuit.
Further, described pre-amplification circuit is by amplifier P1, amplifier P2, triode VT5, N pole is connected with the negative input end of amplifier P1, the diode D8 that P pole is connected with the output of amplifier P1 after resistance R12, positive pole is connected with the negative input end of amplifier P2, the electric capacity C5 of minus earth, N pole is connected with the P pole of diode D8 after resistance R13, the diode D10 that P pole is connected with the emitter stage of triode VT5, positive pole is connected with the output of amplifier P2 after slide rheostat R15, the electric capacity C6 that negative pole is connected with the base stage of triode VT5, P pole is connected with the output of amplifier P1, the diode D9 that N pole is connected with the output of amplifier P2, be serially connected in the resistance R14 between the output of amplifier P2 and the positive pole of electric capacity C6, and one end is connected with the base stage of triode VT5, the resistance R16 that the other end is connected as pre-amplification circuit output and with A/D converter jointly with the positive pole of electric capacity C6 forms, the base stage of described triode VT5 is connected with the control end of slide rheostat R15, and the positive input terminal of described amplifier P2 is connected with the output of amplifier P1, the positive input terminal of described amplifier P1 is also connected with infrared sensor with photoelectric sensor respectively with the extremely common input as pre-amplification circuit of the P of diode D8.
Further, described signal circuits for triggering are by triode VT1, triode VT2, P pole is connected with the base stage of triode VT1 after resistance R1, the diode D2 that N pole is connected with the CONT pin of control chip IC, one end is connected with the base stage of triode VT1, the slide rheostat R2 that the other end is connected with the CONT pin of control chip IC, P pole is connected with the emitter stage of triode VT1, the diode D3 that N pole is connected with the THR pin of control chip IC, N pole is connected with the colelctor electrode of triode VT1, the diode D1 that P pole is connected with the RES pin of control chip IC after resistance R3, positive pole is connected with the P pole of diode D1, the electric capacity C1 of minus earth, the base stage of one end and triode VT1 is jointly as the input of signal circuits for triggering, the resistance R5 that the other end is connected with the base stage of triode VT1, be serially connected in the resistance R4 between the base stage of triode VT1 and the colelctor electrode of triode VT2, positive pole is connected with the base stage of triode VT2, the electric capacity C2 that negative pole is connected with the base stage of triode VT1, N pole is connected with the CONT pin of control chip IC after relay K 1, the diode D4 that P pole is connected with enabling control circuit, and one end is connected with the negative pole of electric capacity C2 after relay K 2, the resistance R10 that the other end is connected with pass gate control circuit forms, the emitter stage of described triode VT2 is connected with the CONT pin of control chip IC, and the emitter stage of described triode VT1 is connected with the sliding end of slide rheostat R2.
Further, described enabling control circuit is by triode VT3, the diode D5 that P pole is connected with the emitter stage of triode VT3 after resistance R7, N pole is connected with lifting motor after the constant open contact K1-1 of relay K 1, the resistance R6 that one end is connected with the base stage of triode VT1, the other end is connected with the N pole of diode D5, and the electric capacity C3 that positive pole is connected with the P pole of diode D5, negative pole is connected with pass gate control circuit forms; The colelctor electrode of described triode VT3 is connected with the P pole of diode D4, and its emitter stage is connected with the DIS pin of control chip IC.
Simultaneously, described pass gate control circuit is by triode VT4, positive pole is connected with the base stage of triode VT3 after resistance R8, the electric capacity C4 that negative pole is connected with the colelctor electrode of triode VT4, P pole is connected with the OUT pin of control chip IC, the diode D6 that N pole is connected with the positive pole of electric capacity C4, P pole is connected with the emitter stage of triode VT4, the diode D7 that N pole is connected with lifting motor after the constant open contact K2-1 of relay K 2, be serially connected in the resistance R9 between the N pole of diode D7 and the positive pole of electric capacity C4, and the resistance R11 be serially connected between the P pole of diode D7 and the base stage of triode VT4 forms, the emitter stage of described triode VT4 is connected with the negative pole of electric capacity C3, and its base stage is connected with the negative pole of electric capacity C2 after relay K 2 through resistance R10 in turn, the GND pin ground connection of described control chip IC.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) not only structure is simple in the present invention, and it is with low cost, the energy automatic door opening when there being people to enter, and can also automatic door-closing when nobody enters, artificial action control switch can be avoided and often forget to close the door or do not closed door owing to worrying and made the harmful pollution such as noise, dust or smog enter situation in rolling door, therefore can ensure rolling door isolated product and production environment.
(2) pre-amplification circuit of the present invention can carry out amplification process to the signal of photoelectric sensor and infrared sensor collection, is convenient to A/D converter and carries out conversion process.
(3) control signal that sends for receiving central processing unit of signal circuits for triggering of the present invention, and this control signal is sent to control chip IC process, open the door so that control lifting motor or close the door.
(4) enabling control circuit of the present invention can the conducting when receiving the enabling control signal that central processing unit sends, and lifting controllable motor rises rolling door.
(5) pass of the present invention gate control circuit can the conducting when receiving the pass gate control signal that central processing unit sends, and lifting controllable motor cuts out rolling door.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of control circuit of the present invention.
Fig. 3 is the electrical block diagram of pre-amplification circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, automatic control system of the present invention, primarily of central processing unit, the A/D converter be all connected with central processing unit and control circuit, the pre-amplification circuit be connected with A/D converter, the photoelectric sensor be all connected with pre-amplification circuit and infrared sensor, and the lifting motor be connected with control circuit forms.Described infrared sensor is for gathering the human body signal outside rolling door, when there being people will enter rolling door, the human body signal collected is sent to A/D converter by infrared sensor, A/D converter is sent to central processing unit after being changed by the signal of infrared sensor collection, central processing unit then sends enabling control signal to control circuit, and control circuit then controls lifting motor and rises rolling door.
Described photoelectric sensor is for gathering human body below rolling door and other object informations, when photoelectric sensor induction sends pass gate control signal less than central processing unit when having people or other objects below rolling door to control circuit, control circuit then controls lifting motor and cuts out rolling door; When photoelectric sensor senses and to have people or other objects below rolling door, the signal of collection is sent to A/D converter conversion, information after conversion will be sent to central processing unit, central processing unit then sends the control signal stopping closing the door to control circuit, control circuit then controls lifting motor and stops action.By the setting of automatic control system of the present invention, can when there being people to enter automatic door opening, and can also automatic door-closing after people enters, artificial action control switch can be avoided and often forget to close the door or do not closed door owing to worrying and made the harmful pollution such as noise, dust or smog enter situation in rolling door, therefore can ensure rolling door isolated product and production environment.
During enforcement, described control circuit by control chip IC, the signal circuits for triggering that input is connected with central processing unit, and the enabling control circuit that is all connected with lifting motor of output and close gate control circuit and form; Described signal circuits for triggering are all connected with control chip IC with enabling control circuit and pass gate control circuit, as shown in Figure 2.What described control chip IC adopted is NE555 integrated chip, and what described central processing unit adopted is SOP8 integrated chip.
Concrete, described signal circuits for triggering by triode VT1, triode VT2, relay K 1, relay K 2, diode D1, diode D2, diode D3, diode D4, electric capacity C1, electric capacity C2, resistance R1, slide rheostat R2, resistance R3, resistance R4, resistance R5 and resistance R10 form.The control signal that described signal circuits for triggering send for receiving central processing unit, and this control signal is sent to control chip IC process, open the door so that control lifting motor or close the door.
During connection, the P pole of described diode D2 is connected with the base stage of triode VT1 after resistance R1, and its N pole is connected with the CONT pin of control chip IC.One end of described slide rheostat R2 is connected with the base stage of triode VT1, and its other end is connected with the CONT pin of control chip IC.The P pole of described diode D3 is connected with the emitter stage of triode VT1, and its N pole is connected with the THR pin of control chip IC.The N pole of described diode D1 is connected with the colelctor electrode of triode VT1, and its P pole is connected with the RES pin of control chip IC after resistance R3.The positive pole of described electric capacity C1 is connected with the P pole of diode D1, its minus earth.The base stage of one end and triode VT1 is jointly as the input of signal circuits for triggering, and its other end is connected with the base stage of triode VT1.Wherein, one end of described resistance R5 is connected with the ZCD pin of SOP8 integrated chip, and the base stage of described triode VT1 is connected with the CS pin of SOP8 integrated chip, and described A/D converter is connected with the MULT pin of SOP8 integrated chip.
Described resistance R4 is serially connected between the base stage of triode VT1 and the colelctor electrode of triode VT2.Described electric capacity C2 positive pole is connected with the base stage of triode VT2, negative pole is connected with the base stage of triode VT1.The N pole of described diode D4 is connected with the CONT pin of control chip IC after relay K 1, and its P pole is connected with enabling control circuit.One end of described resistance R10 is connected with the negative pole of electric capacity C2 after relay K 2, and its other end is connected with pass gate control circuit.Meanwhile, the emitter stage of described triode VT2 is connected with the CONT pin of control chip IC, and the emitter stage of described triode VT1 is connected with the sliding end of slide rheostat R2.
Described enabling control circuit is by triode VT3, and diode D5, electric capacity C3, resistance R6 and resistance R7 form.Described enabling control circuit can the conducting when receiving the enabling control signal that central processing unit sends, and lifting controllable motor rises rolling door.
During connection, the P pole of described diode D5 is connected with the emitter stage of triode VT3 after resistance R7, and its N pole is connected with lifting motor after the constant open contact K1-1 of relay K 1.One end of described resistance R6 is connected with the base stage of triode VT1, and its other end is connected with the N pole of diode D5.The positive pole of described electric capacity C3 is connected with the P pole of diode D5, and its negative pole is connected with pass gate control circuit.Meanwhile, the colelctor electrode of described triode VT3 is connected with the P pole of diode D4, and its emitter stage is connected with the DIS pin of control chip IC.When signal circuits for triggering receive the enabling control signal that central processing unit sends relay K 1 electric, the constant open contact K1-1 of relay K 1 closes, then enabling control circuit controls lifting motor and rises rolling door.
Described pass gate control circuit is by triode VT4, and diode D6, diode D7, electric capacity C4, resistance R8, resistance R9 and resistance R11 form.Described pass gate control circuit can the conducting when receiving the pass gate control signal that central processing unit sends, and lifting controllable motor cuts out rolling door.
During connection, the positive pole of described electric capacity C4 is connected with the base stage of triode VT3 after resistance R8, and its negative pole is connected with the colelctor electrode of triode VT4.The P pole of described diode D6 is connected with the OUT pin of control chip IC, and its N pole is connected with the positive pole of electric capacity C4.The P pole of described diode D7 is connected with the emitter stage of triode VT4, and its N pole is connected with lifting motor after the constant open contact K2-1 of relay K 2.Described resistance R9 is serially connected between the N pole of diode D7 and the positive pole of electric capacity C4, and described resistance R11 is serially connected between the P pole of diode D7 and the base stage of triode VT4.Meanwhile, the emitter stage of described triode VT4 is connected with the negative pole of electric capacity C3, and its base stage is connected with the negative pole of electric capacity C2 after relay K 2 through resistance R10 in turn; The GND pin ground connection of described control chip IC.When signal circuits for triggering receive the pass gate control signal that central processing unit sends relay K 2 electric, the constant open contact K2-1 of relay K 2 closes, then close gate control circuit and control lifting motor and close rolling door.
As shown in Figure 3, described pre-amplification circuit is by amplifier P1, and amplifier P2, triode VT5, diode D8, diode D9, diode D10, electric capacity C5, electric capacity C6, resistance R12, resistance R13, resistance R14, slide rheostat R15 and resistance R16 form.Described pre-amplification circuit can carry out amplification process to the signal of photoelectric sensor and infrared sensor collection, is convenient to A/D converter and carries out conversion process.
During connection, the N pole of described diode D8 is connected with the negative input end of amplifier P1, and its P pole is connected with the output of amplifier P1 after resistance R12.The positive pole of described electric capacity C5 is connected with the negative input end of amplifier P2, its minus earth.The N pole of described diode D10 is connected with the P pole of diode D8 after resistance R13, and its P pole is connected with the emitter stage of triode VT5.The positive pole of described electric capacity C6 is connected with the output of amplifier P2 after slide rheostat R15, and its negative pole is connected with the base stage of triode VT5.The P pole of described diode D9 is connected with the output of amplifier P1, and its N pole is connected with the output of amplifier P2.Described resistance R14 is serially connected between the output of amplifier P2 and the positive pole of electric capacity C6.One end of described resistance R16 is connected with the base stage of triode VT5, and the positive pole of its other end and electric capacity C6 is connected with A/D converter as pre-amplification circuit output jointly.The base stage of described triode VT5 is connected with the control end of slide rheostat R15, and the positive input terminal of described amplifier P2 is connected with the output of amplifier P1.The positive input terminal of described amplifier P1 is also connected with infrared sensor with photoelectric sensor respectively with the extremely common input as pre-amplification circuit of the P of diode D8.
As mentioned above, just the present invention can be realized preferably.
Claims (5)
1. the rolling door automatic control system based on pre-amplification circuit, it is characterized in that: primarily of central processing unit, the A/D converter be all connected with central processing unit and control circuit, the pre-amplification circuit be connected with A/D converter, the photoelectric sensor be all connected with pre-amplification circuit and infrared sensor, and the lifting motor be connected with control circuit forms; Described control circuit by control chip IC, the signal circuits for triggering that input is connected with central processing unit, and the enabling control circuit that is all connected with lifting motor of output and close gate control circuit and form; Described signal circuits for triggering are all connected with control chip IC with enabling control circuit and pass gate control circuit.
2. a kind of rolling door automatic control system based on pre-amplification circuit according to claim 1, it is characterized in that: described pre-amplification circuit is by amplifier P1, amplifier P2, triode VT5, N pole is connected with the negative input end of amplifier P1, the diode D8 that P pole is connected with the output of amplifier P1 after resistance R12, positive pole is connected with the negative input end of amplifier P2, the electric capacity C5 of minus earth, N pole is connected with the P pole of diode D8 after resistance R13, the diode D10 that P pole is connected with the emitter stage of triode VT5, positive pole is connected with the output of amplifier P2 after slide rheostat R15, the electric capacity C6 that negative pole is connected with the base stage of triode VT5, P pole is connected with the output of amplifier P1, the diode D9 that N pole is connected with the output of amplifier P2, be serially connected in the resistance R14 between the output of amplifier P2 and the positive pole of electric capacity C6, and one end is connected with the base stage of triode VT5, the resistance R16 that the other end is connected as pre-amplification circuit output and with A/D converter jointly with the positive pole of electric capacity C6 forms, the base stage of described triode VT5 is connected with the control end of slide rheostat R15, and the positive input terminal of described amplifier P2 is connected with the output of amplifier P1, the positive input terminal of described amplifier P1 is also connected with infrared sensor with photoelectric sensor respectively with the extremely common input as pre-amplification circuit of the P of diode D8.
3. a kind of rolling door automatic control system based on pre-amplification circuit according to claim 2, it is characterized in that: described signal circuits for triggering are by triode VT1, triode VT2, P pole is connected with the base stage of triode VT1 after resistance R1, the diode D2 that N pole is connected with the CONT pin of control chip IC, one end is connected with the base stage of triode VT1, the slide rheostat R2 that the other end is connected with the CONT pin of control chip IC, P pole is connected with the emitter stage of triode VT1, the diode D3 that N pole is connected with the THR pin of control chip IC, N pole is connected with the colelctor electrode of triode VT1, the diode D1 that P pole is connected with the RES pin of control chip IC after resistance R3, positive pole is connected with the P pole of diode D1, the electric capacity C1 of minus earth, the base stage of one end and triode VT1 is jointly as the input of signal circuits for triggering, the resistance R5 that the other end is connected with the base stage of triode VT1, be serially connected in the resistance R4 between the base stage of triode VT1 and the colelctor electrode of triode VT2, positive pole is connected with the base stage of triode VT2, the electric capacity C2 that negative pole is connected with the base stage of triode VT1, N pole is connected with the CONT pin of control chip IC after relay K 1, the diode D4 that P pole is connected with enabling control circuit, and one end is connected with the negative pole of electric capacity C2 after relay K 2, the resistance R10 that the other end is connected with pass gate control circuit forms, the emitter stage of described triode VT2 is connected with the CONT pin of control chip IC, and the emitter stage of described triode VT1 is connected with the sliding end of slide rheostat R2.
4. a kind of rolling door automatic control system based on pre-amplification circuit according to claim 3, it is characterized in that: described enabling control circuit is by triode VT3, the diode D5 that P pole is connected with the emitter stage of triode VT3 after resistance R7, N pole is connected with lifting motor after the constant open contact K1-1 of relay K 1, the resistance R6 that one end is connected with the base stage of triode VT1, the other end is connected with the N pole of diode D5, and the electric capacity C3 that positive pole is connected with the P pole of diode D5, negative pole is connected with pass gate control circuit forms; The colelctor electrode of described triode VT3 is connected with the P pole of diode D4, and its emitter stage is connected with the DIS pin of control chip IC.
5. a kind of rolling door automatic control system based on pre-amplification circuit according to claim 4, it is characterized in that: described pass gate control circuit is by triode VT4, positive pole is connected with the base stage of triode VT3 after resistance R8, the electric capacity C4 that negative pole is connected with the colelctor electrode of triode VT4, P pole is connected with the OUT pin of control chip IC, the diode D6 that N pole is connected with the positive pole of electric capacity C4, P pole is connected with the emitter stage of triode VT4, the diode D7 that N pole is connected with lifting motor after the constant open contact K2-1 of relay K 2, be serially connected in the resistance R9 between the N pole of diode D7 and the positive pole of electric capacity C4, and the resistance R11 be serially connected between the P pole of diode D7 and the base stage of triode VT4 forms, the emitter stage of described triode VT4 is connected with the negative pole of electric capacity C3, and its base stage is connected with the negative pole of electric capacity C2 after relay K 2 through resistance R10 in turn, the GND pin ground connection of described control chip IC.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958241.1A CN105569550A (en) | 2015-12-19 | 2015-12-19 | Pre-amplifier circuit based automatic control system for roller shutter door |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510958241.1A CN105569550A (en) | 2015-12-19 | 2015-12-19 | Pre-amplifier circuit based automatic control system for roller shutter door |
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| CN201510958241.1A Pending CN105569550A (en) | 2015-12-19 | 2015-12-19 | Pre-amplifier circuit based automatic control system for roller shutter door |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106773910A (en) * | 2016-11-22 | 2017-05-31 | 天津航空机电有限公司 | A kind of high linearity difference isolates sample circuit |
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| CN204402331U (en) * | 2014-12-30 | 2015-06-17 | 齐齐哈尔大学 | SCM Based automatic curtain rolling device |
| CN204374720U (en) * | 2015-01-09 | 2015-06-03 | 格拉夫节能制品（南京）有限公司 | A kind of roll-type window or door intelligent security guard centralized control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106773910A (en) * | 2016-11-22 | 2017-05-31 | 天津航空机电有限公司 | A kind of high linearity difference isolates sample circuit |
| CN106773910B (en) * | 2016-11-22 | 2019-05-21 | 天津航空机电有限公司 | A kind of high linearity difference isolation sample circuit |
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Application publication date: 20160511 |